23 April 2012
20120422 Week Rotation Today Rotation Week 20120424

NOAA
5 Active Regions

Flare Forecast

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W08N23
(116",450")
E02-W12
(14)
0.5 -10.5 -1.7e33
2 E47S72
(-211",-890")
E80-E36
(44)
0.5 0.5 1.0e33
3 W36N46
(389",729")
W33-W42
(9)
0.1 0.5 3.5e31

Note: Solar Monitor's coronal hole segmentations are performed by CHIMERA, a copy of which is available at: github.com/TCDSolar/CHIMERA.

The operations of the CHIMERA algorithm is described in a peer reviewed paper: arxiv.org/abs/1711.11476.

An extensive copy of coronal hole properties are available at: solarmonitor.org/data.

The latest positions of the coronal holes are given in heliocentric co-ordinates, and the region positions are valid on 23-Apr-2012 23:00 UT .